MIT Kerberos 5 up to 1.20.1/1.21.0 kadmind lib/kadm5/kadm_rpc_xdr.c _xdr_kadm5_principal_ent_rec uninitialized pointer

Summaryinfo

A vulnerability was found in MIT Kerberos 5 up to 1.20.1/1.21.0. It has been rated as problematic. Affected by this vulnerability is the function _xdr_kadm5_principal_ent_rec in the library lib/kadm5/kadm_rpc_xdr.c of the component kadmind. Performing a manipulation results in uninitialized pointer. This vulnerability was named CVE-2023-36054. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in MIT Kerberos 5 up to 1.20.1/1.21.0 (Network Authentication Software). This affects the function _xdr_kadm5_principal_ent_rec in the library lib/kadm5/kadm_rpc_xdr.c of the component kadmind. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on availability. The summary by CVE is:

lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count.

The weakness was presented 08/08/2023 as ef08b09c9459551aabbe7924fb176f1583053cdd. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-36054 since 06/21/2023. Technical details are known, but no exploit is available.

Upgrading to version 1.20.2 or 1.21.1 eliminates this vulnerability. Applying the patch ef08b09c9459551aabbe7924fb176f1583053cdd is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-40036). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Network Authentication Software

Vendor

• MIT

Name

• Kerberos 5

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.20.0
• 1.20.1
• 1.21.0

License

• open-source

Website

• Vendor: http://www.mit.edu/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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